T86.899 ICD-10-CM Code: Unspecified complication of other transplanted tissue
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Complications of surgical and medical care, not elsewhere classified (T80-T88)
T86.899
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceUnspecified complication of other transplanted tissue
An unspecified problem occurs with a transplanted tissue or organ where the exact nature of the complication is not documented or identified.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Transplant failure or rejection of pancreas
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for T86.899 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for T86.899 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for T86.899 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for T86.899 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for T86.899 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for T86.899 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is T86.899 an HCC code?
No. T86.899 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- T86.899
- Description
- Unspecified complication of other transplanted tissue
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
T86.899 is the ICD-10-CM diagnosis code for unspecified complication of other transplanted tissue. An unspecified problem occurs with a transplanted tissue or organ where the exact nature of the complication is not documented or identified. T86.899 sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering complications of surgical and medical care, not elsewhere classified (t80-t88).
T86.899 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This is a last-resort code; always attempt to determine the specific type of complication.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for T86.899 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a last-resort code; always attempt to determine the specific type of complication
- •Query the provider if the complication type is unclear from documentation